Improved device for securing pulleys to shafts



dimmi Kmme etent- .ctji in.

JOHN H. -BUCKMAN, 0F CINCINNATI, OHIOASSIGNOR T0 IIIMSELF AN PETER, W. REINSHAGEN, OF SAME PLACE. l

. Letters .Pateat N 98,144, dated Deccmbcr- 21,*16g9.

IMPROVE nevrosi PoR SECURING PULLEYS To sHAFTs.

The Schedule referred to in these Letters I atent and making part of the same.

To all whom it may concern.-

Be it known that l, JOHN H. BUCKMAN, of Cin.

cinuati, Hamilton county, State of Ohio, have invented certain new and useful In'nprovements in Devices for Securing Pulleys, Gear-Wheels, Ste., to Shafts; and IA do hereby declare the following to be a sufficiently full, clear, and exact description thereof to enable one skilled in the art to which my invention appcrtains, to make and use it, reference being had to the accompanying drawings, making part of this specification.

My invention has for its object the production ofa fastening-device, applicable alike to -both hollow and solid shutting, and-lone that shall secure the hub 'of the pulley or wheel to the shaft, in such a manner that thc pulley or wheel shall not, by the act of fastening, be forced out of its requiredconcentric position on the shaft, and one that shall cause the hub to hug the shaft equally in all directions; andi My invention consists in constructing the hub of the wheel or pulley of a crowning or double coneshape, to which two rings, bored to match, are fitted, the hub on each side being slotted, or severed at t-wo 0Il more points, in order that the rings, when driven on to the'cones, will serve to contract the bore of the hub, and compelvit to hug the shaft.

In t-hc accompanying drawingsg Figure l is a perspective view of a pulley embodying my invention, one of thc rings being detached.

Figure 2 is an axial section, with .both rings m place.

Ihe hub A is turned on the out-side, tapering from both ends alike, iu the manner as shown, and is yfitted with rings B B', which arc bored tapering to match the hub. t

lhe hub A, at each end, from the cxtreme end to points near the arms, is split, severed, or slotted entions alike to the shaft, and preserves the concenf tricity of thc -pulley or wheel.

It is well known, that in the use of the common taper-key or the set-screw for securing lpulleys, 86e., to shafts, that the inside of the hub, when fastened,

, has but two pointsof bea-ring on the shaft, and those mere line bearings, and that neither the key norsetscrew is admissible for hollow shafts, in consequence of their liability to indent or collapse the shaft.

The key vor set-screw also forces the pulley or wheel ont of true, even when a good lit, so that when these fastcnings are used, the inconvenient drivingfits are essential.

With my device for attachment of the pulley tothe shaft, the hubs may be bored a loose fit, convenient to adjust and remove, and yet, when fastened, be always concentric to the shaft. e

Ihc device is applicable to either hollow or solid shafting.

I claim herein as new, and of my invention- -k The tapering huh A., provided with slots a, in combination with the tightening;rings B B', operating in the manner apd for the purpose specified.

In testinlony of which invention, I hereunto set my baud.

J. H. BUGKMAN. Witnesses:

JEROME DU Bols, JOHN 1.,GLE1cK. 

